Hello! I have 4 silkie girls that range in age from 5 months to 6 months and nobody is laying eggs! My roo is 5 months old and he is trying to jump on the girls, but he has not crowed yet.. When can I expect my girls to start laying? Any tricks? They are in a pen, but with wood chips and hay, but no laying boxes... Do they need laying boxes? Thank for your advice!